| NOUN | animal | Echinoidea, class Echinoidea | sea urchins and sand dollars |
|---|
| Meaning | sea urchins and sand dollars. | |
|---|---|---|
| Synonym | class Echinoidea | |
| Member of | Echinodermata, phylum Echinodermata | radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers |
| Members | Exocycloida, order Exocycloida | Flat sea urchins |
| Spatangoida, order Spatangoida | heart-shaped sea urchins | |
| sea urchin | shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells | |
| Broader | class | (biology) a taxonomic group containing one or more orders |
| Spanish | clase Echinoidea, Echinoidea, equinoideos | |
| Catalan | Echinoidea | |
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